Motorola GTR 8000 - GTR 8000 Base Radio Time and Frequency Inputs; Equalizing the Battery; Table 5-1 Base Radio Time and Frequency Inputs

GTR8000BaseRadio
5.1.1GTR8000BaseRadioTimeandFrequencyInputs
Avarietyofexternaltimeandfrequencyinputscanbeprovidedtothebasestationfornormaloperationorfor
InternalFrequencyReferenceOscillatoralignment.Thefollowingtableprovidesalistofacceptableinputsignal
typesandlevelsforeachbaseradioinputport.
Table5-1BaseRadioTimeandFrequencyInputs
InputPortFrequency
Waveform
LevelImpedanceNote
ExtFreqRef
5MHz
Sine
2.6–5.3Vpp
100kohmsACcoupled
ExtFreqRef
5MHz
Square
45–55%dutycycle100kohmsACcoupled
ExtFreqRef
10MHz
Sine
2.6–5.3Vpp
100kohmsACcoupled
ExtFreqRef
10MHzSquare
45-55%dutycycle100kohmsACcoupled
ExtFreqRef
20MHz
Sine
2.6–5.3Vpp
100kohmsACcoupled
ExtFreqRef
20MHzSquare
45–55%dutycycle100kohmsACcoupled
ExtFreqRef5MHz/1PPS*
Square2.6–5.3Vpp
100kohmsACcoupled;25%
modulation1pps
arriveson75%
dutycycle
1PPS1PPS
Pulse
2.6–5.3Vpp
100kohmsDCcoupled
FrontPanel
ExtFreqRef
5MHz
Sine2–5Vpp;10–18dBm50ohmsACcoupled
FrontPanel
ExtFreqRef
5MHz
Square
45–55%dutycycle50ohmsACcoupled
FrontPanel
ExtFreqRef
10MHz
Sine2–5Vpp;10–18dBm50ohmsACcoupled
FrontPanel
ExtFreqRef
10MHzSquare
45–55%dutycycle50ohmsACcoupled
FrontPanel
ExtFreqRef
5MHz/1PPS*
Square2.6–5.3Vpp
50ohmsACcoupled;25%
modulation1pps
arriveson75%
dutycycle
*25%modulation,1PPSarriveson75%dutycycle.
TheFrontPanelEXTFREQREFconnectionistheFrequencyCalibrator(BNCconnector)onthe
transceivermodule.
5.2EqualizingtheBattery
BatteryEqualizationconguresthepowersupplytosettheproperchargeandcapacityforthestoragebatteries
connectedtothebaseradio.Sitesequippedwithstoragebatteriesthatprovidebaseradiopowerincaseofprimary
powerfailurerequirethebatterycellstobeequalizedperiodically.
5-26871022P86-A-November2012